A new solid has been synthesized by high temperature, flux methods in the molten KCl/CsCl media at 780~800°C. This new compound: K7Cs4Fe9As12O48Cl2, has a layered structure. It crystallizes in orthorhombic space group Cmca(no. 64) with the cell dimensions a = 10.997(2) Å, b = 21.495(4) Å, c = 19.950(4) Å, V = 4716(2) Å3. The X-ray single crystal structure shows that the compound adopts a layered structure consisting of iron arsenate slabs separated by the CsCl lattice. The iron centered octahedra form corner sharing 8-membered rings and expand in the ac plane forming a two dimensional square net. It provides an interesting model for the correlation of magnetic properties and structure. The following is the partial structure of K7Cs4Fe9As12O48Cl2 showing the two-dimensional Fe-O net with Fe in blue and O in red. In this presentation, we will discuss the results of solid state synthesis, crystal growth, and crystal growth, structure analysis, UV-vis spectroscopy and magnetic chacterization. We will also discuss the ion-exchange property and its potential usage in lithium battery applications.
Back to Solid State Chemistry (General Session)
Back to The 56th Southeast Regional Meeting 2004 (November 10-13, 2004)